Cognomen Дем'Ян-Василь (Дем'Ян-Василь 
) , all over the world, is an extremely rare last name. Much more frequently, Дем'Ян-Василь is the forename as well as the last name. Parts of the name also exists independently as a first name Дем'Ян, and a first name Василь.
| VARIANT | COUNTRY |
|---|---|
| Дем'Ян-Василь | Ukraine |